[FieldTrip] missing pos in beamforming

[Jason Chan]

Greetings,

I am adapting the beamformer tutorial to my data.  When I sourceinterpolate
the subtracted sourceA from sourceB data, the 'pos'  disappears.  This seems
to be important for the volume normalization and Grand Average.  I am
running Fieldtrip version: 20110917.  I have placed the code below.

 

Many thanks in advance.

Jason

 

 

Young_CombineFilter_sourceDiff_16_3={};

for i=1:length(Young_CombineFilter_beamform_16_3);

    cfg=[];

    Young_CombineFilter_sourceDiff_16_3{i}
=Young_CombineFilter_beamform_16_3{i}.sourceA;

    Young_CombineFilter_sourceDiff_16_3{i}.avg.pow
=(Young_CombineFilter_beamform_16_3{i}.sourceA.avg.pow -
Young_CombineFilter_beamform_16_3{i}.sourceB.avg.pow)./Young_CombineFilter_b
eamform_16_3{i}.sourceB.avg.pow;

    

    cfg            = [];

    cfg.downsample = 2;

    cfg.parameter  = 'avg.pow';

    cfg.anatomy    = mri{i};

    cfg.keepfilter='yes';

    cfg.interpmethod='linear';

 
Young_CombineFilter_sourceDiffInt_16_3{i}=ft_sourceinterpolate(cfg,Young_Com
bineFilter_sourceDiff_16_3{i}, mri_young{i});

end;

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